#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
void Text1()
{
	int a = 4;
	if (a)
	{
		printf("yes");
	}
	else
	{
		printf("no");
	}
}
void Text2()
{
	int a = 4;
	if (!a)
	{
		printf("yes");
	}
	else
	{
		printf("no");
	}
}
int main()
{
	//Text1();
	Text2();
	return 0;
}